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| 1 | Fundamental Framework and Experiments of the ThirdGeneration of IAP/LASG World OceanGeneral Circulation Model显示文摘1.IntroductionThefirstbaroclinicoceanicgeneralcirculationmodel(OGCM)developedattheStateKeyLaboratoryofNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG),InstituteofAtmosphericPhysics(IAP)isafour--layermodelwithitshorizontalresol... | 金向泽 张学洪 周天军 | 1999 | Advances in Atmospheric Sciences1999,16,2: | 114 |
| 2 | 虚拟现实技术教育应用的潜力、进展与挑战显示文摘2016年被称为'虚拟现实元年'产业领域中投身虚拟现实的创业团队呈爆发式增长。教育尤其是基础教育领域,虚拟现实技术的应用还远远滞后于产业技术的发展。实际上,虚拟现实技术的教育应用意味着一系列优化传统教学观念和教学法的行动课题。教育技术的研究者需要理性认识虚拟现实教育应用的潜力,深入分析虚拟现实技术教育应用的现状,着重从教育视角反思存在的挑战。本研究在分析虚拟现实情境认知模型(VRSC Model)基础上认为,虚拟现实技术教育应用的潜力源于其在激发学习动机、增强学习体验、创设心理沉浸感、实现情境学习和知识迁移等方面的优势;虚拟现实技术教育应用目前主要集中在虚拟现实支持学习环境创设、支持技能实训、支持语言学习、支持特殊儿童教育等四大方面;文章最后从技术和教学法两方面分析了虚拟现实技术教育应用面临的挑战。 | 刘德建 刘晓琳 张琰 陆奥帆 黄荣怀 | 2016 | 开放教育研究2016,22,4: | 302 |
| 3 | 中国区域物流业与经济发展协调度研究--基于复合系统模型与30个省区面板数据显示文摘采用复合系统模型计算了全国30个省(区)物流业子系统与经济子系统的有序度,在此基础上得出了全国与东、中、西3个地区各子系统有序度和复合系统协调度,并进一步分析了经济最发达的4个区域的协调度在研究时段内的变化情况。结果显示对物流业子系统贡献最大的序参量是周转量,受各个地方政府2005年加大物流业投入影响,物流业固定资产投资对物流业子系统贡献也明显上升。对经济子系统而言,城镇与农村居民恩格尔系数与人均工资先后对经济子系统贡献最大。总体上,东、中、西3个地区协调度呈上升趋势。 | 张毅 陈圻 | 2010 | 软科学2010,24,12: | 68 |
| 4 | Relocation of the M8.0 Wenchuan earthquake and its aftershock sequence显示文摘We relocated M8.0 Wenchuan earthquake and 2706 aftershocks with M≥2.0 using double-difference algorithm and obtained relocations of 2553 events. To reduce the influence of lateral variation in crustal and upper mantle velocity structure, we used different velocity models for the east and west side of Longmenshan fault zone. In the relocation process, we added seismic data from portable seismic sta-tions close to the shocks to constrain focal depths. The precisions in E-W, N-S, and U-D directions after relocation are 0.6, 0.7, and 2.5 km respectively. The relocation results show that the aftershock epi-centers of Wenchuan earthquake were distributed in NE-SW direction, with a total length of about 330 km. The aftershocks were concentrated on the west side of the central fault of Longmenshan fault zone, excluding those on the north of Qingchuan, which obviously deviated from the surface fault and passed through Pingwu-Qingchuan fault in the north. The dominant focal depths of the aftershocks are between 5 and 20 km, the average depth is 13.3 km, and the depth of the relocated main shock is 16.0 km. The depth profile reveals that focal depth distribution in some of the areas is characterized by high-angle westward dipping. The rupture mode of the main shock features reverse faulting in the south, with a large strike-slip component in the north. | HUANG Yuan WU JianPing ZHANG TianZhong ZHANG DongNing | 2008 | Science China Earth Sciences2008,51,12: | 64 |
| 5 | A NEW METHOD FOR STRUCTURAL TOPOLOGICAL OPTIMIZATION BASED ON THE CONCEPT OF INDEPENDENT CONTINUOUS VARIABLES AND SMOOTH MODEL显示文摘A concept of the independent-continuous topological variable is pro-posed to establish its corresponding smooth model of structural topological optimiza-tion. The method can overcome difficulties that are encountered in conventionalmodels and algorithms for the optimization of the structural topology. Its appli-cation to truss topological optimization with stress and displacement constraints issatisfactory, with convergence faster than that of sectional optimizations. | 隋允康 杨德庆 | 1998 | Acta Mechanica Sinica1998,14,2: | 78 |
| 6 | A Land Surface Model(IAP94) for Climate Studies PartI:Formulation and Validation in Off-line Experiments显示文摘ALandSurfaceModel(IAP94)forClimateStudiesPartI:FormulationandValidationinOf-lineExperiments①DaiYongjiu(戴永久)andZengQingcun(曾庆存... | 戴永久 曾庆存 | 1997 | Advances in Atmospheric Sciences1997,14,4: | 55 |
| 7 | A Nine-layer Atmospheric General Circulation Model and Its Performance显示文摘ANine-layerAtmosphericGeneralCirculationModelandItsPerformanceWuGuoxiong(吴国雄),LiuHui(刘辉),ZhaoYucheng(赵宇澄),andLiWeiping(李伟平),(... | 吴国雄 刘辉 赵宇澄 李伟平 | 1996 | Advances in Atmospheric Sciences1996,13,1: | 59 |
| 8 | 结构方程模型原理及其应用注意事项显示文摘 | 秦浩 陈景武 | 2006 | 中国卫生统计2006,23,4: | 50 |
| 9 | 分割放射治疗中剂量、时间因素的生物学基础显示文摘The biology rationale for radiotherapy in the treatment of malignant disease is based on repair, repopulation,reoxygenation and cell cycle redistribution. Various aspects of the roles of the 4R’ are discussed, including in determining the sensitivity of tumors and normal tissue tolerances. An improvement in therapeutic ratio may derive from reducing the dose per fraction and minimizing the overall treatmemt duration. Some methods have developed to predict the response of normal and tumor tissues before radiotherapy. The parameters of cell survival at 2Gy(SF2) was correlated with clinical outcome. There is reasons to suppose that the pretreatment tumor LI and Tpot mat be good predictors for tumor repopulation kinetics. This review also discussed the rationale for the use of LQ model in fractionated radiotherapy. | 冯炎 | 1995 | 中华放射肿瘤学杂志1995,4,2: | 42 |
| 10 | A Survey on Terahertz Communications显示文摘With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G), bridging the gap between millimeter wave(mmWave) and optical frequency ranges. The purpose of this paper is to provide a comprehensive literature review on the development towards THz communications and presents some key technologies faced in THz wireless communication systems. Firstly, despite the substantial hardware problems that have to be developed in terms of the THz solid state superheterodyne receiver, high speed THz modulators and THz antennas, the practical THz channel model and the efficient THz beamforming are also described to compensate for the severe path attenuation. Moreover, two different kinds of lab-level THz communication systems are introduced minutely, named a solid state THz communication system and a spatial direct modulation THz communication system, respectively. The solid state THz system converts intermediate frequency(IF) modulated signal to THz frequency while the direct modulation THz system allows the high power THz sources to input for approving the relatively long distance communications. Finally, we discuss several potential application scenarios as well as some vital technical challenges that will be encountered in the future THz communications. | Zhi Chen Xinying Ma Bo Zhang Yaxin Zhang Zhongqian Niu Ningyuan Kuang Wenjie Chen Lingxiang Li Shaoqian Li | 2019 | China Communications2019,16,2: | 43 |
| 11 | Indocyanine green clearance test and model for end-stage liver disease score of patients with liver cirrhosis显示文摘BACKGROUND:The indocyanine green(ICG)clearance test(clearance rate(K)and retention rate at 15 minutes (R15))is a sensitive indicator to evaluate liver function. The model for end-stage liver disease(MELD)score has emerged as a useful tool for estimating the mortality of patients awaiting liver transplantation and has recently been validated on patients with liver diseases of various etiologies and severity.In this study,we investigated the correlation between the ICG clearance test and MELD score of patients with liver cirrhosis. METHODS:From June 2007 to March 2008,52 patients with liver cirrhosis admitted to our center were classified into Child-Pugh class A(8 patients),B(14)and C(30).The ICG clearance test(K value and R15)was performed by ICG pulse spectrophotometry(DDG-3300K),and the MELD scores of patients were calculated. RESULTS:As the Child-Pugh classification of liver function gradually deteriorated,the K value decreased, while R15 and MELD score increased.There were significant statistical differences in K value,R15 and MELD score in patients with different Child-Pugh classifications. Significant correlations were found between the parameters of the ICG clearance test(K value and R15)and MELD score.A negative correlation was observed between K value and MELD score(r=-0.892,P<0.05),while a positive correlation was observed between R15 and MELD score(r=0.804,P<0.05).CONCLUSIONS:The ICG clearance test and MELD score are good parameters for evaluating liver function.Moreover, K value and R15 have significant correlations with MELD score,especially the K value,which may be a convenient and appropriate indicator to evaluate liver function of patients with liver cirrhosis. | Sheng, Qin-Song Lang, Ren He, Qiang Yang, Yong-Jiu Zhao, De-Fang Chen, Da-Zhi | 2009 | Hepatobiliary & Pancreatic Diseases International2009,8,1: | 37 |
| 12 | 结构方程模型及其应用显示文摘 | 曲波 郭海强 任继萍 孙高 | 2005 | 中国卫生统计2005,22,6: | 38 |
| 13 | A chronic ulcerative colitis model in rats显示文摘INTRODUCTIONIn recent years,there have been many reports aboutanimal model to investigate drugs for inflammatorybowel diseases (IBD).The experimental animalmodel often used is acetic acid-induced damage ofcolonic muscosa.In the present study,this animalmodel was investigated by administering variousconcentrations of TNBS. | Zheng L Gao ZQ Wang SX | 2000 | World Journal of Gastroenterology2000,6,1: | 37 |
| 14 | Chinese Economic Structure and SDA Model | CHEN Xi\|kang 1,\ GUO Ju\|e 2 1. Academy of Machemation and Systems Science, Chinese Academy of Science Beijing 100080, China 2. Shaanxi Institute of Finance and Economics, Xi′an 710061, China | 2000 | Systems Science and Systems Engineering2000,10,2: | 40 |
| 15 | Mechanism of delayed encephalopathy after acute carbon monoxide poisoning显示文摘Many hypotheses exist regarding the mechanism underlying delayed encephalopathy after acute carbon monoxide poisoning(DEACMP),including the inflammation and immune-mediated damage hypothesis and the cellular apoptosis and direct neuronal toxicity hypothesis;however,no existing hypothesis provides a satisfactory explanation for the complex clinical processes observed in DEACMP.Leucine-rich repeat and immunoglobulin-like domain-containing protein-1(LINGO-1)activates the Ras homolog gene family member A(Rho A)/Rho-associated coiled-coil containing protein kinase 2(ROCK2)signaling pathway,which negatively regulates oligodendrocyte myelination,axonal growth,and neuronal survival,causing myelin damage and participating in the pathophysiological processes associated with many central nervous system diseases.However,whether LINGO-1 is involved in DEACMP remains unclear.A DEACMP model was established in rats by allowing them to inhale 1000 ppm carbon monoxide gas for 40 minutes,followed by 3000 ppm carbon monoxide gas for an additional 20 minutes.The results showed that compared with control rats,DEACMP rats showed significantly increased water maze latency and increased protein and m RNA expression levels of LINGO-1,Rho A,and ROCK2 in the brain.Compared with normal rats,significant increases in injured neurons in the hippocampus and myelin sheath damage in the lateral geniculate body were observed in DEACMP rats.From days 1 to 21 after DEACMP,the intraperitoneal injection of retinoic acid(10 mg/kg),which can inhibit LINGO-1 expression,was able to improve the above changes observed in the DEACMP model.Therefore,the overexpression of LINGO-1 appeared to increase following carbon monoxide poisoning,activating the Rho A/ROCK2 signaling pathway,which may be an important pathophysiological mechanism underlying DEACMP.This study was reviewed and approved by the Medical Ethics Committee of Xiangya Hospital of Central South Hospital(approval No.201612684)on December 26,2016. | Yan-Qing Huang Zheng-Rong Peng Fang-Ling Huang A-Li Yang | 2020 | Neural Regeneration Research2020,15,12: | 35 |
| 16 | Metastatic human hepatocellular carcinoma models in nude mice and cell line with metastatic potential显示文摘Metastatic human HCC model is needed for the studies on mechanism and intervention of metastatic recurrence. By using orthotopic implantation of histologically intact tissues of 30 surgical specimens, a patient like metastatic model of human HCC in nude mice (LCI-D20)and a Iow metastatic model of human HCC in nude mice LCI-D35 ) have been established. All mice with transplanted LCI-D20 tumors exhibited extremely high metastatic ability including spontaneous metastasis to liver, lungs, lymph nodes and peritoneal seeding.Remarkable difference was also found in expression of some of the invasiveness related genes and growth factors between the LCI-D20 and LCI-D35 tumors. PAI-Iincreased gradually following tumor progression in LCID20 model, and correlated with tumor size and AFP level,Phasic expression of tissue intercellular adhesion molecule-I in this model was also observed. Using corneal micropocket model, it was demonstrated that the vascular response induced by LCI-D20 tumor was stronger than that induced by LCI-D35 tumor. Similar report on metastatic human HCC model in nude mice and human HCC cell line with metastatic potential was rarely found in the literature. This LCI-D20 model has been widely used for the studies on intervention of metastasis, including antiangiogenesis, antisense approach, metalloproteinase inhibitor, differentiation inducer, etc. It is concluded that the establishment of metastatic human HCC model in nude mice and human HCC cell line with metastatic potential will provide important models for the in vivo and in vitro study of HCC invasiveness, angiogenesis as well as intervention of HCC recurrence. | Zhao-You Tang Fan-Xian Sun Jian Tian Sheng-Long Ye Yin-Kun Liu Kang-Da Liu Qiong Xue Jie Chen Jing-Lin Xia Lun-Xiu Qin Hui-Chuan Sun Lu Wang Jian Zhou Yan Li Zeng-Chen Ma Xin-Da Zhou Zhi-Quan Wu Zhi-Ying Lin Bing-Hui Yang Liver Cancer Institute of Fudan University and Zhongshan Hospital,Shanghai 200032,China | 2001 | World Journal of Gastroenterology2001,7,5: | 34 |
| 17 | Numerical simulation of mechanisms of deformation,failure and energy dissipation in porous rock media subjected to wave stresses显示文摘The pore characteristics,mineral compositions,physical and mechanical properties of the subarkose sandstones were acquired by means of CT scan,X-ray diffraction and physical tests.A few physical models possessing the same pore characteristics and matrix properties but different porosities compared to the natural sandstones were developed.The 3D finite element models of the rock media with varied porosities were established based on the CT image processing of the physical models and the MIMICS software platform.The failure processes of the porous rock media loaded by the split Hopkinson pressure bar(SHPB) were simulated by satisfying the elastic wave propagation theory.The dynamic responses,stress transition,deformation and failure mechanisms of the porous rock media subjected to the wave stresses were analyzed.It is shown that an explicit and quantitative analysis of the stress,strain and deformation and failure mechanisms of porous rocks under the wave stresses can be achieved by using the developed 3D finite element models.With applied wave stresses of certain amplitude and velocity,no evident pore deformation was observed for the rock media with a porosity less than 15%.The deformation is dominantly the combination of microplasticity(shear strain),cracking(tensile strain) of matrix and coalescence of the cracked regions around pores.Shear stresses lead to microplasticity,while tensile stresses result in cracking of the matrix.Cracking and coalescence of the matrix elements in the neighborhood of pores resulted from the high transverse tensile stress or tensile strain which exceeded the threshold values.The simulation results of stress wave propagation,deformation and failure mechanisms and energy dissipation in porous rock media were in good agreement with the physical tests.The present study provides a reference for analyzing the intrinsic mechanisms of the complex dynamic response,stress transit mode,deformation and failure mechanisms and the disaster mechanisms of rock media. | JU Yang1,2,WANG HuiJie1,YANG YongMing1,HU QinAng3 & PENG RuiDong1 1 State Key Laboratory of Coal Resources and Safe Mining,Beijing Key Laboratory of Fracture and Damage Mechanics of Rock and Concrete,China University of Mining and Technology,Beijing 100083,China 2 Department of Mechanical and Manufacturing Engineering,University of Calgary,Calgary,Alberta,T2N 1N4,Canada 3 School of Environment and Civil Engineering,College of Engineering,Oklahoma State University,Stillwater,OK 74078,USA | 2010 | Science China(Technological Sciences)2010,53,4: | 32 |
| 18 | Differential areas for differential stations (DADS): A new method of establishing grid ionospheric model显示文摘Differential Area for Differential Stations (DADS), a new method of establishing grid ionospheric model, is presented. The preliminary results show that it is possible to establish a real time large range high precision grid ionospheric model (GIM) using the DADS and the GPS data of the Chinese crust movement observation network (CCMON). | Yuan, YB Ou, JK | 2002 | Chinese Science Bulletin2002,47,12: | 32 |
| 19 | 谣言实现的社会机制及对信息的治理显示文摘Rumors are a type of false information, a consequence of an asymmetrical informational structure. This paper focuses on the social mechanisms of rumor fulfilling. Rumors with important contents related to people’s personal interests win acceptance through changing people’s expected payoffs, misleading people to the belief that acceptance of the rumor would beneficially outperform rejection of it. Nevertheless, it is risky to believe rumors; therefore, people make their decision whether to believe a rumor or not by referring to other people’s choices. An analysis was performed first within a game model that incorporated the variables of an individual’s expectancy and other people’s impact to predict whether the individual would accept or reject a rumor. Another analysis followed to further examine the functions of some dynamic mechanisms in rumor fulfilling when group pressure and network effects were introduced. Finally, an exploratory discussion on how to prevent rumors and erase their effects via information management strategies was presented. | 李国武 | 2005 | 社会2005,25,4: | 31 |
| 20 | The Interannual Variability of East Asian Monsoon and Its Relationship with SST in a Coupled Atmosphere-Ocean-Land Climate Model显示文摘Based on a 200 year simulation and reanalysis data (1980-1996), the general characteristics of East Asian monsoon (EAM) were analyzed in the first part of the paper. It is clear from this research that the South Asian monsoon (SAM) defined by Webster and Yang (1992) is geographically and dynamically different from the East Asian monsoon (EAM). The region of the monsoon defined by Webster and Yang (1992) is located in the tropical region of Asia (40-110°E, 10-20°N), including the Indian monsoon and the Southeast Asian monsoon, while the EAM defined in this paper is located in the subtropical region of East Asia (110-125°E, 20-40°N). The components and the seasonal variations of the SAM and EAM are different and they characterize the tropical and subtropical Asian monsoon systems respectively. A suitable index (EAMI) for East Asian monsoon was then defined to describe the strength of EAM in this paper. In the second part of the paper, the interannual variability of EAM and its relationship with sea surface temperature (SST) in the 200 year simulation were studied by using the composite method, wavelet transformation. and the moving correlation coefficient method. The summer EAMI is negatively correlated with ENSO (E1 Nino and Southern Oscillation) cycle represented by the NINO3 sea surface temperature anomaly (SSTA) in the preceding April and January. while the winter EAM is closely correlated with the succeeding spring SST over the Pacific in the coupled model. The general differences of EAM between E1 Nino and La Nina cases were studied in the model through composite analysis. It was also revealed that the dominating time scales of EAM variability may change in the long-term variation and the strength may also change. The anomalous winter EAM may have some correlation with the succeeding summer EAM. but this relationship may disappear sometimes in the long-term climate variation. Such time-dependence was found in the relationship between EAM and SST in the long-term climate simulation as well. | 王会军 | 2000 | Advances in Atmospheric Sciences2000,17,1: | 33 |